Have you checked to see if the subtitles are available for a thumb drive download? If your player has a USB input the subs will show up as "other" on the subtitle menu. They may not be available for bonus material, but I have the French 4K of "Eiffel" and the thumb drive is small enough to keep...
Columbia is mentioned on the box, but Warner probably had the european video distribution deal with Columbia as they both shared the same lot from 1972 until the 90's and were known as The Burbank Studios
If this deluxe French version of Lord Jim is a bootleg, it is the most exquisite one ever made! The included media book is 204 pages and both a DVD & BR are included. Not the best quality BR I own but, entirely within format specs.